Home Repair Budget Estimator

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.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Home Repair Budget Estimator

Estimate your home repair or renovation budget based on project type, square footage, and finish quality level.

Project Type

Kitchen Remodel Bathroom Remodel Roof Replacement Flooring Interior Painting HVAC Replacement Window Replacement Room Addition Basement Finishing Deck / Patio

Area / Scope (sq ft)

For roofs/HVAC enter total home sq ft; for windows enter number of windows × 15.

Finish Quality

Budget / Basic Mid-Range High-End / Luxury

Home Age (years)

Older homes may require additional structural or code-compliance work.

DIY Labor Portion (%)

Percentage of labor you plan to do yourself (max 80%).

Regional Cost Index

Low Cost (rural / Midwest) Average (national median) High Cost (Northeast / Mountain West) Very High Cost (NYC / SF / Hawaii)

Estimate Budget

function homCalc() { var resultDiv = document.getElementById('hom-result');

// --- Gather inputs --- var project = document.getElementById('hom-project').value; var sqft = parseFloat(document.getElementById('hom-sqft').value); var quality = parseFloat(document.getElementById('hom-quality').value); var age = parseFloat(document.getElementById('hom-age').value); var diy = parseFloat(document.getElementById('hom-diy').value); var region = parseFloat(document.getElementById('hom-region').value);

// --- Validation --- if (isNaN(sqft) || sqft Please enter a valid area (minimum 10 sq ft).'; return; } if (sqft > 10000) { resultDiv.innerHTML = 'Area seems too large. Please check your input.'; return; } if (isNaN(age) || age 200) { resultDiv.innerHTML = 'Please enter a valid home age (0–200 years).'; return; } if (isNaN(diy) || diy 80) { resultDiv.innerHTML = 'DIY portion must be between 0% and 80%.'; return; }

// --- Base cost per sq ft (mid-range, national average) --- // Source: HomeAdvisor / Remodeling Magazine 2023 Cost vs Value Report var baseCosts = { kitchen: { perSqft: 150, laborPct: 0.35, minSqft: 50, maxSqft: 500 }, bathroom: { perSqft: 120, laborPct: 0.40, minSqft: 30, maxSqft: 300 }, roof: { perSqft: 5.5, laborPct: 0.60, minSqft: 800, maxSqft: 8000 }, flooring: { perSqft: 8, laborPct: 0.45, minSqft: 50, maxSqft: 5000 }, painting: { perSqft: 3.5, laborPct: 0.70, minSqft: 100, maxSqft: 8000 }, hvac: { perSqft: 7, laborPct: 0.50, minSqft: 500, maxSqft: 8000 }, windows: { perSqft: 55, laborPct: 0.30, minSqft: 15, maxSqft: 1500 }, addition: { perSqft: 200, laborPct: 0.40, minSqft: 100, maxSqft: 2000 }, basement: { perSqft: 50, laborPct: 0.35, minSqft: 200, maxSqft: 3000 }, deck: { perSqft: 35, laborPct: 0.50, minSqft: 100, maxSqft: 2000 } };

var proj = baseCosts[project];

// Soft scope warning (not a hard stop) var scopeWarning = ''; if (sqft proj.maxSqft) { scopeWarning = 'Note: Entered area is larger than typical for this project type. Consider splitting into phases.

'; }

// --- Core cost calculation --- // Base material + labor cost var baseCost = proj.perSqft * sqft;

// Quality multiplier applied to full cost var qualityCost = baseCost * quality;

// Regional adjustment var regionalCost = qualityCost * region;

// Age surcharge: homes > 20 years add 0.3% per year over 20 for hidden issues var ageSurchargeRate = (age > 20) ? (age - 20) * 0.003 : 0; ageSurchargeRate = Math.min(ageSurchargeRate, 0.25); // cap at 25% var ageSurcharge = regionalCost * ageSurchargeRate;

var subtotal = regionalCost + ageSurcharge;

// DIY savings: applied only to labor portion var laborCost = subtotal * proj.laborPct; var diySavings = laborCost * (diy / 100); var afterDIY = subtotal - diySavings;

// Contingency: 10% for newer homes, 15% for homes > 30 years var contingencyRate = (age > 30) ? 0.15 : 0.10; var contingency = afterDIY * contingencyRate;

// Permit & inspection fees: ~2% of project cost (typical US average) var permitFees = afterDIY * 0.02;

// Total var total = afterDIY + contingency + permitFees;

// Low / high range ±15% var low = total * 0.85; var high = total * 1.15;

// --- Format currency --- function fmt(n) { return '$' + n.toLocaleString('en-US', {minimumFractionDigits: 0, maximumFractionDigits: 0}); } function fmtPct(n) { return (n * 100).toFixed(1) + '%'; }

// --- Project label --- var labels = { kitchen:'Kitchen Remodel', bathroom:'Bathroom Remodel', roof:'Roof Replacement', flooring:'Flooring', painting:'Interior Painting', hvac:'HVAC Replacement', windows:'Window Replacement', addition:'Room Addition', basement:'Basement Finishing', deck:'Deck / Patio' };

resultDiv.innerHTML = scopeWarning + '### Estimated Budget: ' + fmt(low) + ' – ' + fmt(high) + ' ' + '' + 'Project' + labels[project] + ' (' + sqft.toLocaleString() + ' sq ft)' + 'Base Material + Labor' + fmt(baseCost) + '' + 'Quality Adjustment (' + fmtPct(quality - 1 >= 0 ? quality - 1 : -(1 - quality)) + (quality >= 1 ? ' premium' : ' savings') + ')' + fmt(qualityCost) + '' + 'Regional Adjustment (×' + region.toFixed(2) + ')' + fmt(regionalCost) + '' + 'Age Surcharge (' + fmtPct(ageSurchargeRate) + ')' + fmt(ageSurcharge) + '' + 'DIY Labor Savings (' + diy + '% of ' + fmtPct(proj.laborPct) + ' labor)−' + fmt(diySavings) + '' + 'Contingency (' + fmtPct(contingencyRate) + ')' + fmt(contingency) + '' + 'Permit & Inspection Fees (2%)' + fmt(permitFees) + '' + 'Total Estimate' + fmt(total) + '' + 'Realistic Range (±15%)' + fmt(low) + ' – ' + fmt(high) + '' + ''; }

#### Formula

Step 1 – Base Cost: Base Cost = Base Rate ($/sq ft) × Area (sq ft) Step 2 – Quality: Quality Cost = Base Cost × Quality Multiplier (0.75 / 1.00 / 1.60) Step 3 – Regional: Regional Cost = Quality Cost × Regional Index (0.85 – 1.40) Step 4 – Age Surcharge: Age Surcharge = Regional Cost × min((Age − 20) × 0.3%, 25%) [if Age > 20] Step 5 – DIY Savings: DIY Savings = (Regional Cost + Age Surcharge) × Labor% × (DIY% / 100) Step 6 – Contingency: 10% (home ≤ 30 yrs) or 15% (home > 30 yrs) of post-DIY subtotal Step 7 – Permits: 2% of post-DIY subtotal Total = Subtotal − DIY Savings + Contingency + Permits Range = Total × 0.85 to Total × 1.15

#### Assumptions & References

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References

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